Sealing compound for pyrotechnic devices



June 10, 1930. c s 1,762,911

SEALING COMPOUND FOR PYROTECHNIC DEVICES Filed Feb. 2, 1926 Swarm 95% ww Z'Md Z Patented June 10, 1930 UNITED STATES PATENT OFFICE HERBERTCLAUSER, OF ELKTON, MARYLAND, ASSIGNOR TO VICTORY SPARKLER & SPECIALTYCOMPANY, OF ELKTON, MARYLAND, A CORPORATION OF DELAWARE SEALING COMPOUNDFOR PYROTECHNIC DEVICES Application filed February 2, 1926. Serial No.85,592.

This invention relates to pyrotechnic devices or fireworks and consistsin a novel composition for sealing the same to confine the gas generatedby explosion or combustion.

I have chosen, as an example of the use of my improved sealing material,the firework known as a toy torpedo or tube torpedo, and have shown sucha device in the drawingyin which:

Fig. 1 is an elevation of a tubular toy torpedo;

Fig. 2 is a central vertical section of the same; and

Fig. 3 is a plan View thereof.

In these views, A is the container or tube, of paper, cardboard, or thelike; B is a cup of the same material inserted in the lower end of thetube; D is the explosive composition placed in and on said cup; E is thegravel or other detonating medium; C is a disk of cardboard fitt d inthe tube on top of the charge, and 1", F epresents tln: sealing materialin the extreme en s of the. tube.

Many materials and compositions have. been tried and used for sealingfireworks of this type, but none of them, as far as I am aware, hasproved entirely satisfactory, either from the standpoint of itsmannfacture or of its behavior under varying climatic conditions.

My improved composition obviates all the defects heretofore existent inthe materials used for the purpose in quail W1. For instance, it doesnot require an excessive time for drying; it does not crack after beingdried: it does not expand or contract in unequal relation to the otherparts of the device; it does not shatter upon the impact necessary toexplode the torpedo, before the explosion takes place, and, whenshattered,

the flying pieces cannot do any harm or injure anyone. Further, it iswaterproof and fireproof.

The preferred composition of my improved sealing material is as follows:silicate of soda lbs.; kaolin 40 lbs; zinc oxide 9.5 lbs.; and coloringmaterial 0.5 lbs. The latter may be ultramarine blue, Vermilion red, orthe like, and may, of course, be

sets very quickly, thus facilitating its transport from one departmentof the factory to another, and finally set-s more quickly than thecompositions heretofore used.

The above proportions of the ingredients have proved very satisfactory,but I do not Wish to limit myself to them.

Having thus described my invention, what I claim to be new and desire tosecure by Letters Patent is:

1. A material for sealing fireworks comprising a mixture ofsubstantially 50% of silicate of soda, substantially 10% of a metullicoxide and substantially 40% of silicate of alumina.

2. material for sealing fireworks comprising a mixtu e of substantially5095' of sili ate of soda, substantially 10% of zinc oxide andsubstantially 40% of kaolin.

In testimony whereof I hereunto aflix my signature.

HERBERT CLAUSER.

